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59 Cards in this Set
- Front
- Back
What is unique about Uranus’s rotation?
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Spins on its side
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Who first purposed the geocentric model of the solar system?
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--Ptolemy
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The sun contains what percentage of the solar system’s mass?
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99.7%
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List the planets form closest to farthest from the sun.
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Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto
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Who proposed the heliocentric model of the solar system?
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Copernicus
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Name the outer planets?
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Jupiter, Saturn, Uranus, Neptune, Pluto
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Name the inner planets
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Mercury, Venus, Earth and Mars
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Which planets have one moon?
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Earth and Pluto
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Which planets have rings?
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Saturn, Jupiter, Uranus, Neptune
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Copernicus stated what three beliefs of the solar system?
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--Heliocentric
--Earth spins on its axis --Moon revolves around the earth |
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Which planets have no moons?
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Mercury and Venus
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Which planets have two moons?
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Mars
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Pluto is located in which part of the solar system?
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Kuiper Belt
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Which planets day is longer then its year?
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Venus
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In 1994 what comet slammed into Jupiter?
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Shoemaker Levi
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Why does Mercury have the widest temperature range?
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Very close to sun--during day its facing the sun so it is hot--all night facing away from sun so very cold and atmosphere traps the cold in just as it does with the heat
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Explain how the balance between the solar wind and polar gravity affected the order of gas giants?
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Harder to push away so it stayed close by--easier ones were pushed away
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What are the parts of a comet?
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-Nucleus
-Coma -Tail |
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What is the first stage in solar system formation?
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Nebula
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Why is the sky black on Mercury?
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No atmosphere--doesnt scatter light
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Copernicus concluded that the planets revolve aroudn the sun------
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retrograde motion
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Which is commonly known as a shooting star?
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meteor
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What are teh two main differences between an asteroid and a meteoroid?
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Asteroids are bigger and it orbits the sun
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Explain why Venus is the hottest planet?
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Atmosphere traps the heat
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What is the only spacecraft to visit Uranus and Neptune?
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Voyager 2
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Where do most meteoroids come from?
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Melting comets
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What is the hottest planet in the solar system?
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Venus
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What planet is named after the god of the underworld?
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Pluto
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Which planet was first to be discovered by telescope?
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Uranus
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Explain the geocentric model of the universe.
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Everything revolves around the earth
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Explain the heliocentric model fo the solar system
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Everything revolves around the sun
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What are the names of Mar's two moons?
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Phobos and Dimodes
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Give two main differences between inner and outer planets
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-Inner planets are rock and outer are gas
-Inner have less moons and outer have more |
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Why do the years get longer farther away from the sun?
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-Longer trip around the sun
-Travel at a slower speed |
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What two forces keep planets in motion around the sun?
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-Inertia
-Gravity |
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List the three reasons why NASA is so interested in Mars?
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-Fossilized bacteria
-Atmosphere is similar to ours -Polar ice caps and water |
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What are Kepler's three laws of motion?
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-Sun is not in the middle
-Closer the planets are the faster they orbit -Elliptical orbit |
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How long does it take earth to rotate once on its axis?
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23.56 minutes
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Which directoin does the tail of a comet pont and why?
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Away from the sun because of the solar wind
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What year will Halle's comet next visit earth?
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2061
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What is the largest known asteroid?
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Ceres
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How close is the North Star?
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4.24 light years
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How was the solar system formed?
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-starts as a big ball of gas called a nebula
-gravity contracts the mass -under so much pressure starts to burn -once it starts to burn it pushes other materials away -material cools and forms planet |
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What is a meteor?
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Meteors are rocks in the atmosphere
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What is a Meteorite?
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A meteorite is a rock that hits a planet
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What is a meteoroid?
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A Meteoroids is a mass of rock in space
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What is the distance from teh sun to the Earth?
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150 million km
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What is the order of planets largest to smallest?
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Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars, Mercury, Pluto
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Which planets have rings?
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Jupiter, Saturn, Uranus, Neptune
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Which planets have no moons?
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Mercury and Venus
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Which planets have 1 moon?
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Pluto and Earth
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Which planets have 2 or more moons?
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Mars, Jupiter, Saturn, Uranus, Neptune
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Name 3 reasons why Mercury has a lot of craters
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-no atmosphere (atmosphere burns up meteors)
-no water to make them erode -mercury is close to sun |
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What causes the bands on Jupiter?
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High Winds
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What are the Spots on Planets?
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Hurricanes
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Where do comets come from?
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The Oort Cloud and the Kuiper Belt
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What is an asteroid?
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A piece of rock similar to but smaller than a planet orbiting the sun.
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Where are most asteroids found?
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In the Asteroid belt between Mars and Jupiter
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What is a comet?
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Comets- a mass of rock and dust mixed with frozen water, methane and ammonia (gas) “dirty snowballs”
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